ConfigurationConfiguration file is located in /etc/backintime/config. I haven't yet found any useful documentation. The included config file was generated by the KDE4 GUI client. I removed many of the GUI specific configuration lines. If you come across good documentation, please leave a comment.

If you run /usr/bin/backintime as root, it uses /etc/backintime/config for configuration.If you wish to run backintime as a regular user, copy the /etc/backintime/config file to ~/.config/backintime/config.

Here is what I have managed to figure out from experimenting using the GUI client:config.version=2snapshots.automatic_backup_mode=20snapshots.cron.nice=true# Manually run snapshots are not removed automaticallysnapshots.dont_remove_named_snapshots=truesnapshots.exclude_patterns=*.backup*:*~# Useful if you have mixed snapshot frequenciessnapshots.expert.per_directory_schedule=true#0-manual,10-hourly,20-daily,30-weekly,40-monthly# [file/folder]|[snapshot frequency]snapshots.include_folders=/etc|30:/home:|20:/root|30:/var/named|40snapshots.min_free_space.enabled=true# 10=Mb, 20=Gbsnapshots.min_free_space.unit=20# Maintain minimum of 1G free space on destinationsnapshots.min_free_space.value=1snapshots.notify.enabled=true# Backup destination. Create 'backintime' folder manually.snapshots.path=/backupsnapshots.remove_old_snapshots.enabled=true# 20=days,30=weeks,80=yearssnapshots.remove_old_snapshots.unit=30# Remove backups older than 27 weekssnapshots.remove_old_snapshots.value=27# keep all snapshots from today & yesterday# keep one snapshot for the last week and one for two weeks ago# keep one snapshot per month for all previous months of this year# keep one snapshot per year for all previous yearssnapshots.smart_remove=true